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Start ›› Pressure controlled reversing valve

Pressure controlled reversing valve

New for the US market; used in Europe for over 20 years

Pressure controlled reversing hydraulic valve

Reversing action without electrical components

Pressure relief valve is built into the valve house

Dial with graduated scale for easy pressure adjustment

Soft reversing action that saves other components in the system

Compensation for pressure drop

Reliable

NG10 (CETOP 5) & NG6 (CETOP 3)

Uses: waste disposal compactors, bottom sludge scraper systems, muck removal systems, chip or pellet feeders, etc.
Option: The pressure reversing valve can be adapted to always start in the same direction, e.g. waste disposal compactors which, for safety reasons, should always start by reversing.

Download Product Data Sheet

Function and range of applications

The valve reverses the direction of the ram so that it reciprocates. The rams direction changes automatically when the set pressure is reached, e.g. when the ram is fully extended or when the load increases. The valve can replace limit switches and pressure switches.

Max pressure limit

To prevent inadvertent setting of too high a pressure, the control dial has a built-in stop for maximum permissible pressure. The valve is delivered from the factory with this stop set to the value requested by the customer. The range that the pressure can be set to is 70-240 bar.

Special built-in compensation
for pressure drop

Long hydraulic lines and narrow flow passage will, especially when the fluid is cold, cause a pressure drop between the valve and the cylinder reducing the push force of the ram. The built-in function can reduce the pressure drop by as much as 75%.

Example of function

Let us assume that a hydraulic system has a pressure drop of 40 bar with the valve set at 150 bar. When the set pressure is reached the valve begins to shunt part of the flow directly back to the tank. When the flow to the cylinder decreases, a pressure drop, which is proportional to the square of the flow, will also occur. As much a half of the flow can be shunted the valve reverses the flow direction. The pressure drop of 40 bar is therefore reduced by 75% to 10 bar leaving 140 bar to drive the ram. Whithout this built-in function only 110 bar will be available to the ram. To equate the 140 bar the system would have to be set at 180 bar and in this way compensate the pressure drop.

	Set pressure on valve without compensation for pressure drop
	Pressure at valve with compensation for pressure drop
	Pressure drop
	Working pressure used atcylinder